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Tangle aims to untangle your graphs, by providing a set of classes for managing different types of graphs, and mixins for adding specific feature sets.

Graph types:

  • SimpleGraph
  • MultiGraph
  • DiGraph
  • DAG
  • ~~Tree~~

Feature mixins:

  • Filesystem directory graph
  • ~~Coloring~~
  • ~~GraphViz~~

See the changelog for recent changes.


Add this line to your application's Gemfile:

gem 'tangle'

And then execute:

$ bundle

Or install it yourself as:

$ gem install tangle

g.add_vertex name: 'a'
g.add_vertex name: 'b'
g.add_edge 'a', 'b'
=> true
g.add_edge 'b', 'b'
=> Tangle::LoopError (loops not allowed)


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install.

Mixin API

A mixin is a module with optional submodules for each of the classes Graph, Vertex, and Edge. If the mixin needs initial state it should provide a keyword initializer #initialize_kwarg_KEYWORD(argument), that will be called when the object is #initalized with a matching kwarg.


module WeightedEdges
    module Edge
        def initialize_kwarg_weight(weight)
            @weight = weight

        def weight

        def weight=(new_weight)
            @weight = new_weight
end [WeightedEdges])


Bug reports and pull requests are welcome on GitHub at Pull requests should be rebased to HEAD of master before submitting, and all commits must be signed with valid GPG key. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Tangle project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.